RTL localesLocale Locale = language version, often a combination of a language code and a region code, for instance es_MX denotes Spanish as it’s used in Mexico. A list of all locales supported by WordPress in https://make.wordpress.org/polyglots/teams/: In 3.4, you will no longer need to specify $text_direction = 'rtl'; in your $locale.php file. Please remove it from $locale.php, and if this makes your $locale.php empty, then remove the file. (Please branch /trunk/ off into /3.3/ first, in case there is a 3.3.2.)
The following locales have been included: ar, ckb, fa_IR, he_IL, ug_CN, dv, fa_AF, ha, ps, uz_UZ, yi. If you are missing (or are incorrectly included), let me know.